WO2017028410A1

WO2017028410A1 - Vibrating motor and electronic device

Info

Publication number: WO2017028410A1
Application number: PCT/CN2015/097111
Authority: WO
Inventors: 祖峰磊; 李勇
Original assignee: 歌尔声学股份有限公司
Priority date: 2015-08-18
Filing date: 2015-12-11
Publication date: 2017-02-23
Also published as: US10491090B2; US20180241292A1; CN204993010U

Abstract

A vibrating motor and an electronic device. The vibrating motor comprises a housing formed by an upper shell (1) and a lower shell (2), and a slider portion and a stator portion are accommodated in a cavity encircled by the housing. The slider portion comprises magnets (5), spring plates (7), and a mass block (8). The mass block (8) has accommodation grooves (81) matching the external profiles of the magnets (5), and the magnets (5) are accommodated into the accommodation grooves (81). The mass block (8) is connected to the upper shell (1) by using the spring plates (7), and is suspended inside the housing. The stator portion comprises coils (3) and a frame (4) made of a magnetic material. The frame (4) is fixed on the lower shell (2), and has accommodation structures (41) matching the external profiles of the coils (3). The coils (3) are embedded in the accommodation structures (41) of the frame (4). Coils are embedded in a frame made of a magnetic conductive material, and magnetic induction lines that diverge freely are folded and constrained in the magnetic conductive material, and are transmitted to the slider portion of the vibrating motor, thereby improving the utilization of the magnetic induction lines, and improving the vibration performance of the motor.

Description

Vibration motor and electronic device

Technical field

The invention relates to the field of machinery, and in particular to a vibration motor and an electronic device.

Background of the invention

At present, the vibration motor is generally driven by a simple coil, but the magnetic induction line in the electromagnetic induction region is free to diverge, resulting in a waste of many magnetic induction lines. Therefore, there is a need for a magnetically permeable medium to constrain the magnetic line of inductance and improve magnetic field utilization.

Summary of the invention

The invention provides a vibration motor and an electronic device to solve the problem of low utilization rate of magnetic induction lines in the prior art.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

In one aspect, the present invention provides a vibration motor including a housing formed by an upper casing 1 and a lower casing 2, the cavity enclosed by the casing housing a mover portion and a stator portion; the mover portion comprising: a magnet 5, the elastic piece 7 and the mass 8; the mass 8 has a receiving groove 81 adapted to the contour of the magnet 5, the magnet 5 is received in the receiving groove 81, and a spring piece 7 is arranged at each side of the upper case 1 The mass 8 is connected to the upper casing 1 by the elastic piece 7 and suspended inside the casing; the stator portion includes a coil 3, the stator portion further comprising a basin frame 4 made of a magnetic material;

The basin frame 4 is fixed to the lower casing 2 and has a receiving structure 41 adapted to the contour of the coil 3, the coil 3 being embedded in the receiving structure 41 of the basin frame 4.

Optionally, the elastic piece 7 is a non-closed elliptical shape, including an inner plane 71 having a certain gap, an outer plane 72, and an elastic connecting portion 73 symmetrically located between the inner plane 71 and the outer plane 72;

The inner plane 71 is welded to the side end face of the mass 8, and the outer plane 72 is welded to the inner surface of the upper casing 1; the inner plane 71 is parallel to the outer plane 72 and is collectively parallel to the side end faces of the mass 8.

Optionally, the mover portion further includes a washer 9 fixed to the upper surface of the mass 8, and the washer 9 is a magnetic conductive metal material for preventing magnetic flux leakage.

Optionally, the mover portion further includes a edge washer 6, the edge washer 6 and the magnet 5 are collectively received in the receiving groove 81 of the mass block 8, and the edge washer 6 is located on the upper side of the magnet 5, and the mass block The upper surface of 8 is flush; Bianhuasi 6 is a magnetically permeable material for preventing magnetic flux leakage.

Alternatively, the distance between the upper surface of the basin frame 4 and the lower surface of the mass 8 is between 0.05 mm and 0.3 mm.

Optionally, the basin frame 4 is a soft magnet metal magnetically permeable material.

Optionally, the enamel wire of the coil 3 is a copper wire wrapped by a glue material.

Alternatively, the mass 8 is made of a tungsten alloy, the magnet 5 is made of a permanent magnet, and the elastic piece 7 is a metal material having toughness.

In another aspect, the present invention also provides an electronic device comprising the vibration motor provided by the above technical solution.

An advantageous effect of the embodiment of the present invention is that the present invention discloses a vibration motor and an electronic device. The vibration motor is formed by embedding a coil into a basin frame made of a magnetically permeable material, and the freely diverging magnetic induction line is gathered by the basin frame. It is confined in the magnetic conductive material and transmitted to the mover part of the vibration motor, thereby improving the utilization of the magnetic induction line and significantly improving the vibration performance of the motor.

The above description is only an overview of the technical solutions of the present invention, and in order to more clearly understand the technical means of the present invention, the specific embodiments of the present invention are hereinafter described.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing: 1 is an exploded view of a vibration motor according to an embodiment of the present invention;

2 is a schematic view showing a state in which a basin frame is fixed on an upper casing according to an embodiment of the present invention;

3 is a cross-sectional view of a vibration motor according to an embodiment of the present invention;

4 is a top plan view of a vibration motor according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a spring piece according to an embodiment of the present invention; FIG.

In the figure: 1, upper shell; 2, lower shell; 3, coil; 4, basin frame; 41, housing structure; 5, magnet; 6, edge Huasi; 7, shrapnel; 71, inner plane; 72, outer plane 73, elastic connecting part; 8, mass; 81, receiving groove; 9, Huasi board.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

First, a brief description of the orientation words involved in the specific embodiment is given. In this embodiment, the left and right directions and the front and rear directions are defined under the normal working state of the vibration motor, and the vibration direction of the vibration motor is the left and right direction, and the thickness direction of the vibration motor. In the up and down direction, the side of the mass is above the vibration motor, and the side of the coil is below the vibration motor.

1 is an exploded view of a vibration motor according to an embodiment of the present invention, FIG. 2 is a schematic view showing a state in which a basin frame is fixed to an upper casing according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a vibration motor according to an embodiment of the present invention; 4 is a top view of a vibration motor provided by an embodiment of the present invention.

As shown in FIG. 1 to FIG. 4, the vibration motor of the present embodiment includes a casing composed of an upper casing 1 and a lower casing 2, and a cavity surrounded by the casing houses a mover portion and a stator portion.

The movable part includes: a magnet 5, a spring piece 7 and a mass 8; the mass 8 has a receiving groove 81 adapted to the contour of the magnet 5, and the magnet 5 is received in the receiving groove 81, and the two sides of the upper case 1 are located. At least one elastic piece 7 is disposed at each of the positions, and the mass 8 is connected to the upper casing 1 through the elastic piece 7, and is suspended inside the casing.

The stator portion comprises a coil 3 and a basin frame 4 made of a magnetic material, the basin frame 4 being fixed to the lower casing 2, having a receiving structure 41 adapted to the contour of the coil 3, the coil 3 being embedded in the receiving structure 41 of the basin frame 4.

The distance between the upper surface of the bowl frame 4 and the lower surface of the mass 8 is between 0.05 mm and 0.3 mm. This embodiment preferably, as shown in Fig. 3, the upper surface of the bowl frame 4 and the lower portion of the mass 8 The distance d between the surfaces is not more than 0.1 mm to maximize the magnetic flux transmitted to the magnetic field of the mover portion.

Optionally, the basin frame 4 in the embodiment is a soft magnet metal magnetic material, the enameled wire of the coil 3 is a copper wire wrapped by a glue material, the mass 8 is a tungsten alloy material, and the magnet 5 is a permanent magnet material, and the elastic piece 7 is a tough metal material.

The vibration motor of the present embodiment is formed by embedding a coil into a basin frame made of a magnetically permeable material, and using a basin frame to gather and constrain the freely diverging magnetic induction line into the magnetic conductive material and transmit it to the mover portion of the vibration motor. Thereby, the utilization of the magnetic induction line is improved, and the vibration performance of the motor is remarkably improved.

In a preferred embodiment of the present embodiment, as shown in FIG. 5, the elastic piece 7 of the vibration motor has a non-closed elliptical shape, including an inner plane 71 having a certain gap, an outer plane 72, and a symmetrically located inner plane 71 and outer plane 72. The elastic connection portion 73 between.

As shown in FIG. 4, the preferred embodiment connects the mass to the upper casing of the vibration motor by symmetrical elastic pieces, and the symmetry of the elastic pieces can provide stable support for the vibration of the mass.

In another preferred embodiment of the embodiment, as illustrated in FIG. 1, the mover portion of the vibration motor further includes a washer 9 fixed to the upper surface of the mass 8, and the washer 9 is a magnetically permeable metal material for Prevent magnetic leakage.

In still another preferred embodiment of the present embodiment, as shown in FIG. 3, the mover portion of the vibration motor further includes a side washer 6, and the edge washer 6 and the magnet 5 are housed together in the receiving groove 81 of the mass 8, and The edge washer 6 is located on the upper side of the magnet 5 and is flush with the upper surface of the mass 8; the edge washer 6 is a magnetic conductive material for preventing magnetic flux leakage.

Referring to Fig. 3, a vibration motor structure having two sets of coils and three magnets is exemplarily shown. The magnets on the left and right sides of the intermediate magnet are each provided with a side ribs 6, and the edge ribs 6 can effectively prevent leakage at the edge position. Magnetic problem.

Based on the same design concept as the above-described vibration motor, the present invention also provides an electronic device including the vibration motor provided by the above embodiment.

In summary, the present invention provides a vibration motor and an electronic device. The vibration motor is formed by embedding a coil into a basin frame made of a magnetically permeable material, and the freely diverging magnetic sensing line is gathered and constrained to be guided by the basin frame. The material is transmitted to the mover portion of the vibration motor, thereby improving the utilization of the magnetic induction line and significantly improving the vibration performance of the motor.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A vibration motor includes a casing composed of an upper casing (1) and a lower casing (2), the cavity enclosed by the casing houses a mover portion and a stator portion; the mover portion includes: a magnet (5) , the elastic piece (7) and the mass (8); the mass (8) has a receiving groove (81) adapted to the contour of the magnet (5), and the magnet (5) is received in the receiving groove (81), the upper case ( 1) at each of the two sides of the position is provided with a spring piece (7), the mass (8) is connected to the upper case (1) through the elastic piece (7), and suspended inside the casing; the stator part includes a coil ( 3), characterized in that the stator portion further comprises a basin frame (4) made of a magnetic material; the basin frame (4) is fixed on the lower casing (2) and has a receiving structure adapted to the contour of the coil (3) (41) The coil (3) is embedded in the receiving structure (41) of the basin frame (4).
A vibration motor according to claim 1, wherein the elastic piece (7) has a non-closed elliptical shape including an inner plane (71) having a certain gap, an outer plane (72), and a symmetrically located inner plane (71) and An elastic connecting portion (73) between the outer planes (72);

The inner plane (71) is welded to the side end face of the mass (8), and the outer plane (72) is welded to the inner surface of the upper shell (1); the inner plane (71) is parallel to the outer plane (72) and is parallel to the mass The side end face of the block (8).
The vibration motor according to claim 1, wherein the mover portion further comprises a washer (9) fixed to an upper surface of the mass (8), and the washer (9) is a magnetic conductive metal material. Used to prevent magnetic flux leakage.
The vibration motor according to claim 1, wherein the mover portion further comprises a side washer (6), and the edge washer (6) and the magnet (5) are housed together in the receiving groove of the mass (8). In (81), the edge (6) is located on the upper side of the magnet (5) and is flush with the upper surface of the mass (8); the edge (6) is a magnetically permeable material for preventing magnetic leakage.
A vibration motor according to claim 1, characterized in that the distance between the upper surface of the basin frame (4) and the lower surface of the mass (8) is between 0.05 mm and 0.3 mm.
The vibration motor according to claim 1, characterized in that the basin frame (4) is a soft magnet metal magnetically permeable material.
The vibration motor according to claim 1, characterized in that the enamel wire of the coil (3) is a copper wire wrapped with a glue material.
The vibration motor according to claim 1, wherein the mass (8) is made of a tungsten alloy, the magnet (5) is made of a permanent magnet, and the elastic piece (7) is a metal material having toughness.
An electronic device comprising the vibration motor of any of claims 1-8.